Self-closing aperture-cover.



Patented Oct. 2, 900.-

'M. W. SEWALL. SELF OLOSINQ APEBTUBE DOVER.

(Application filed Bar. 2, 1900.) (No Model.) 2-Sh00ta-Sh0ot l.

IVA/lama 67 x l W/TNESSES m T M V N A TTOHNE) No. 659,000. Patontod 0M. 2, I900. M. W. SEWALL. SELFOLOSING APERTUBE COVER.

(Application filed Ru. 3, 1900.)

2 Shoots-Shoat 2.

(No llodel.)

INVENTOR.

WITNESSES.-

A TTORNEK TNE non-us PETERS c0, mow-urns. WASHINGTON. I:v c.

' FNITED STATES PATENT OFFICE.

MINOT'I W. SEWALL, 0E ROSELLE, NEW JERSEY, AssIcNoR To THE BABCOGK & WILOOX COMPANY, on NEW YORK, N. Y.

SELF-CLOSING APERTURE-COVER.

SPECIFICATION forming part of Letters Patent No. 659,000. dated October 2, 1900.

Application filed March 2, 1900. 7

To all whom it may concern:

Be it known that I, MINOTT W. SEWALL, a citizen of the United States, residing at B0- selle, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Self-Closing Aperture-Covers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention as herein illustrated and described is designed for use as a self-closing cleaning-door for steam-generators. The invention, however, is adapted to be used as a door, gate, or window or analogous thing to cover an aperture or opening in other structures.

The invention consists in a plate or disk of proper shape and size to cover the aperture or opening operating in a vertical or inclined direction relatively to the axis of the opening and provided with fixed guideways that direct the plate and trunnions, that permit its oscillation to accommodate itself to its seat in its closing operation, and to a position to retain it in place when opened, all as hereinafter particularly described, reference being had to the accompanying drawings, forming part of this specification, in wh ich Figure 1 represents a vertical section of a part of the inclosing side wall of a water-tube steam-generator to which the invention is applied; Fig. 2, a partial front elevation of the same; Fig. 3, a sectional plan view; Fig.

4, a vertical sectional View showing a modified construction, and Figs. 5, 6, 7, and 8 enlarged views of the invention detached and from which reference to the construction and operation of the parts may be conveniently made in connection with the following description.

a is the cover or door, and b the aperture or opening, the cover being shown in open position in Fig. 7 and in closed position, Figs. 6 and 8. Y

0 care trun nions, fixed to the cover or formed as an integral part thereof, which engage with ways d d, that guide the cover in its opening and closing movement, the opening movement being effected bylifting the cover by hand or by applying a bar beneath the the central lug h. The cover is also provided Serial No. 7,070. (No model.)

with flanges 12 o, whichbear upon the ways 01 d and serve in its movement to maintain it parallel therewith. The trunnions permit the cover to oscillate, and in its opening or upward movement its upperedgetis brought in contact with the inclined lug k, which turns the cover to the position shown in Fig. 7, throwing its lower edge minwardly and in connection with the projection or catch 92, which may be alone provided, as shown in Fig. 4, or formed, as shown, as an extension of the flanges o 0. In its self-closing movement the lower edge of the cover is disengaged from the projection or catch n by simply forcing its upper edge t' inwardly by a light tap or blow, the cover then falling and seating itself in its closed position, as shown in Figs. 6 and 8. The face surrounding the aperture forming theseat of the cover when closed is shown in thisinstanoe slightly inclined, the cover being guided thereby in its descent, and by this construction a close contact with its seat is insured.

In Fig. 4 a modified construction is shown, in which the ways that guide the trunnions of the cover are inclined and the'inclined lug k is omitted. The coverin this construction is seated in a relatively vertical position, as shown in said figure. This modification presents a'mere transposition of details in the construction which may be desired in the use of the invention in other situations.

The device, as heretofore described, may be applied as a door, gate, window, or for other use to which it may be adapted. Its particular adaptation as a cleaning-door for steamgenerators is shown in Figs. 1 to 4, it being applied within a casing 5, setin the side wall t of the generator, a series of covers and openings to being in this instance shown arranged on a plane with the spaces between the tubes of the generator,which are placed in the semicircular recesses :10. (Shown in Figs. 1 and 4.) The casing 5 and also the lining z of the wall of the generator are constructed with flaring sides, as shown in Figs. 2 and 3, to obtain greater sweep of operation among the tubes with a cleaning-tool or in the introduction of a blast or other known cleaning expedient.

Having thus fully described my invention,

what I claim, and desire to secure by Letters Patent, is

1. A self-closing aperture-cover consisting of a pivotal plate or disk, engaging with snit- 3. A cleaning-aperture for steam-generators located in its inclosing walls, constructed with flaring sides, as shown, and fitted with one or more pivotal self-closing doors, movable in a vertical or inclined direction and engaging with suitable fixtures to guide and retain the same, substantially-as described.

In testimony whereof I affix my signature in presence of two witnesses.

MINOTT W. SEWALL.

Witnesses: I

B. SAXBERG, L. M. KIRBY. 

